Steel's impact on North America is huge. Steel formed the railroads which fueled the United States and the rest of North America. The railroads helped a quicker expansion westward and made many products that were hard to get readily available. For example, if there were Oregon peaches that someone wanted in New York City, it wasn't possible to get that. But, after the invention of the railroad, you could ship anything to anywhere around the country. This also helped grow the population because nutritious foods could be brought everywhere which allowed the population to expand. With more people and more stuff from around the country, the United State's technology level increased as well. The invention of the car was made possible by being able to ship parts all around the US. Many other things were made possible by this as well.